Frameworks for shielding devices

ABSTRACT

A framework for shielding devices comprising a plurality of interconnectible elements and intended for use in furnaces, combustion chambers and like apparatuses. The framework is selfsupporting and the elements forming the framework are so designed as to permit being exchanged individually. this is made possible in that most of the elements, which are substantially H-shaped, are provided with a pair of transverse projections having outwardly curved surfaces and a pair of transverse projections having inwardly curved surfaces, the distance between the facing, outwardly and inwardly curved surfaces of said projections being so dimensioned that a projection having inwardly curved surfaces which is associated with one element and a projection having outwardly curved surfaces which is associated with another element can be accommodated between said facing, curved surfaces.

United States Patent Nobelius FRAMEWORKS FOR SHIELDING DEVICES [75] Inventor: Gustav Nobelius, Hagersten, Sweden [73] Assignee: Bruun & Sorensen AB, Farsta.

Sweden 22 Filed: Apr. 3, 1974 [21] Appl No.: 457,463

[451 May 13, 1975 Primary Examiner-John .Ii Camby Attorney Agent, or Firm-Bucknam and Archer [57] ABSTRACT A framework for shielding devices comprising a plurality of interconnectible elements and intended for i use in furnaces, combustion chambers and like apparatuses. The framework is self-supporting and the elements forming the framework are so designed as to permit being exchanged individually. this is made possible in that most of the elements, which are substantially H-shaped, are provided with a pair of transverse projections having outwardly curved surfaces and a pair of transverse projections having inwardly curved surfaces, the distance between the facing, outwardly and inwardly curved surfaces of said projections being so dimensioned that a projection having inwardly curved surfaces which is associated with one element and a projection having outwardly curved surfaces which is associated with another element can be accommodated between said facing, curved surfaces.

8 Claims, 12 Drawing Figures 1 FRAMEWORKS FOR SHIELDING DEVICES This invention relates to a framework for shielding devices which comprises detachably assembled elements and is adapted to be mounted in furnaces, combustion chambers and like apparatuses.

It has already been suggested to design furnace linings in the form of interconnectible elements of metal which after mounting are provided with a surface layer of refractory material. However, for their function the prior-art furnace linings are dependent on the provision of supporting surfaces or like means between or against which the linings are set up.

One object of the present invention is to provide a framework for a shielding device, so arranged that shielding can be realized in a freely depending fashion, that is, in such a way that it need be supported only at the top.

Another object of the invention is to provide a framework of such a nature that the individual constituent parts thereof are readily exchangeable without necessitating disassembly of the entire framework.

According to the invention, the elements forming the main body of the framework, which are substantially H-shaped, are provided with a pair of transverse projections having outwardly curved surfaces and a pair of transverse projections having inwardly curved surfaces, and in one and the same element the relative distance between the facing, curved surfaces of the pair of projections having outwardly curved surfaces and the pair of projections having inwardly curved surfaces is so dimensioned that a projection having outwardly curved surfaces which is associated with one element and a projection having inwardly curved surfaces which is associated with another element can be accommodated between said facing, curved surfaces.

An embodiment of the framework according to the invention will be more fully described hereinbelow and with reference to the accompanying drawing in which:

FIG. 1 partly in cross section shows a cut-out portion of the framework, as viewed from in front;

FIG. 2 shows a cross section of the same portion on the line AA in FIG. 1;

FIG. 3 shows a cross section on the line B-B in FIG.

FIGS. 4, S and 6 show a front view, side view and plan view, respectively, of an element terminating the framework at the top;

FIGS. 7 and 8 show a front view and side view, respectively, of an element terminating the framework at the bottom;

FIGS. 9 and show a front view and side view, respectively, of a complementary embodiment of the element terminating the framework at the bottom;

FIG. II shows a cross section of a locking means arranged at the bottom of the framework;

FIG. 12 on a smaller scale shows a plan view of the locking means in PK]. 11.

According to the invention, a framework for a shielding device is composed of top edge elements 1, the framework elements proper 2, and bottom edge elements 3 and 3', respectively.

The top edge elements include a hook-shaped portion 4 which is designed to be hooked onto a portion of the furnace or combustion chamber body, which portion is formed by the flange ofa beam or like means so that the remaining element will depend in a substantially perpendicular fashion. The element is in the form of a recumbent H, the lower stem being shorter than the upper stem. The facing sides 5 and 6 of the upper and lower portions 7 and 8 of the element are cupshaped so as to define recesses 9 and 10 which face away from one another.

The elements 2 constituting the main body of the framework are also in the form of a recumbent H, the upper and lower stems 11 and 12 of which are, however, of equal length. In each of the elements the upwardly and downwardly facing sides 13 znd 14 of the upper portion 11 are curved outwardly, while the upwardly and downwardly facing sides 15 and 16 of the lower portion 12 are curved inwardly.

The distance or space 17 between the upper and the lower portion 11 and 12, respectively, ofa first element is so dimensioned that the lower portion 12 of a second laterally offset and slightly higher positioned element and the upper portion 11 of a third laterally offset and slightly lower positioned element can be accommo dated in said space 17, the lower portion 12 of the higher element engaging the underside 14 of the first element and the upper side of the upper portion 1] of the third element, said latter upper portion 11 also engaging the upper side 15 of the lower portion 12 of the first element.

Like the top edge element 1, the bottom edge element 3 has a hook-shaped portion 18 which merges into a lower portion 19 having an inwardly curved upper side 20 and into an upper portion 21 having outwardly curved upper and lower sides 22 and 23.

The bottom edge element 3 has a narrow web which merges into a hook-shaped portion 18', and an upper portion 21' having outwardly curved upper and lower sides.

The hook-shaped portions 18 and 18' are arranged to form a seat for locking means 24, FIGS. 11 and 12, which bridge adjoining bottom edge elements 3 and 3' and which are inserted from above into the grooves of the hook-shaped portions 18, 18', thereby locking these portions together.

Recesses 25 in the form of dove-tail grooves are provided in the forwardly and rearwardly facing surfaces of the elements 1, 2 and 3. Upon application of the refractory material to the shielding device framework, material will penetrate into said recesses 25, retention of said material being insured by the shape of the recesses.

At the assembly of the shielding device framework, the top edge elements 1 are first mounted on said beam, and elements 2 are then successively hooked onto said top edge elements 1. Because of the different height of the bottom edge elements 3 and 3, a smooth lower edge will be obtained, which is held in position by the locking means 24.

The portions of the elements or anyway those upper portions which have outwardly curved surfaces are of a thickness or transverse extension smaller than the distance between the edges of pairs of facing, inwardly curved surfaces 5, 6, l5, 16, 20. By this means, when the framework has been damaged and is in need of repair, merely the damaged element and the subjacent elements need be removed. In fact, the elements can be brought into and out of engagement with the adjoining elements by being swung about the upper portion ll, 2| and being pulled out of the conforming space between the adjoining elements.

The framework according to the invention may be made planar, but it is preferably intended to be cylindrical or arcuate. To make possible a lateral deflection between the elements the outwardly curved surfaces are slightly conical, that is, the radius of curvature is slightly smaller at the outer end than at the inner end. The inwardly curved surfaces may at the inner end be in the form of an arc and at the outer portion be formed of two arcs interconnected by a planar surface.

From the foregoing description, it will be appreciated by the artisan that the invention basically provides an improvement in a framework for supporting refractory lining'. This improvement basically comprises a plurality of detachably interconnected elements 2 and preferably the top edge and bottom edge elements 1, 3 and 3'. The elements 1, 2, 3, and 3 are generally H-shaped and are oriented with the legs defined by portions 11, 12, .7, 8, l9, and 21, of adjacent elements being in lengthwise contact. The legs of these elements have curved surfaces accommodating such lengthwise contact, and the curved surfaces on the legs of adjacent elements-are generally complementary to allow pivotal movement of individual elements for easy replacement in the framework.

While a preferred embodiment of the invention has been described and shown, those skilled in the art will realize that the invention can be modified in several ways within the spirit and scope of the appended claims.

What I claim and desire to secure by Letters Patent 1. In a framework for supporting a refractory lining, the improvement which comprises a plurality of detachably interconnected elements disposed to receive and support a refractory lining, said elements being generally H-shaped and oriented with the legs of adjacent elements in lengthwise contact, the legs of said elements having curved surfaces accommodating said lengthwise contact, and the curved surfaces on the legs of adjacent elements being generally complementary to allow pivotal movement of individual elements for replacement in the framework.

2. The improvement according to claim 1 wherein the legs of said H-shaped elements are spaced-apart to receive in lengthwise contact between them the legs of two adjacent elements.

3. The improvement according to claim 1 wherein said H-shaped elements have recesses that receive and retain the refractory lining material.

4. The improvement according to claim 1 including H-shaped elements arranged to define a top edge portion of the framework and having hook-shaped projections that accommodate suspension of the framework.

5. The improvement according to claim 1 including H-shaped elements arranged to define a bottom edge portion of the framework and having hook-shaped projections that cooperate with locking means to prevent lateral displacement of said elements.

6. The improvement according to claim 1 wherein said H-shaped elements have one leg with 'convexly curved surfaces and the other leg with concavely curved surfaces.

7. The improvement according to claim 6 wherein the radius of curvature of said convexly curved surface decreases toward the free ends of the leg.

8. The improvement according to claim 6 wherein said concavely curved surfaces are of a greater width at the free ends of the leg than at the central portion thereof. 

1. In a framework for supporting a refractory lining, the improvement which comprises a plurality of detachably interconnected elements disposed to receive and support a refractory lining, said elements being generally H-shaped and oriented with the legs of adjacent elements in lengthwise contact, the legs of said elements having curved surfaces accommodating said lengthwise contact, and the curved surfaces on the legs of adjacent elements being generally complementary to allow pivotal movement of individual elements for replacement in the framework.
 2. The improvement according to claim 1 wherein the legs of said H-shaped elements are spaced-apart to receive in lengthwise contact between them the legs of two adjacent elements.
 3. The improvement according to claim 1 wherein said H-shaped elements have recesses that receive and retain the refractory lining material.
 4. The improvement according to claim 1 including H-shaped elements arranged to define a top edge portion of the framework and having hook-shaped projections that accommodate suspension of the framework.
 5. The improvement according to claim 1 including H-shaped elements arranged to define a bottom edge portion of the framework and having hook-shaped projections that cooperate with locking means to prevent lateral displacement of said elements.
 6. The improvement according to claim 1 wherein said H-shaped elements have one leg with convexly curved surfaces and the other leg with concavely curved surfaces.
 7. The improvement according to claim 6 wherein the radius of curvature of said convexly curved surface decreases toward the free ends of the leg.
 8. The improvement according to claim 6 wherein said concavely curved surfaces are of a greater width at the free ends of the leg than at the central portion thereof. 